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Environmental fate & pathways

Adsorption / desorption

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Description of key information

The adsorption potential of phosphoric acid, potassium salt (2:3) is assumed to be low

Key value for chemical safety assessment

Additional information

The current methods used for the determination of the adsorption potential of a certain substance are not suitable for phosphoric acid, potassium salt (2:3), dihydrate. Neither OECD Guideline No. 121, Estimation of the Adsorption Coefficient (Koc ) on Soil and on Sewage Sludge using High Performance Liquid Chromatography (HPLC), nor the Estimation Programs Interface (EPI) SuiteTM (US EPA and Syracuse Research Corporation, 2009) have been validated for inorganic substances. Inorganic soluble salts will exist in a dissociated form in aqueous solutions and as such, the adsorption potential will be low. Based on this information, testing for this endpoint is considered scientifically unjustified.